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How do I reference a Django settings variable in my models.py?
...ed: with environment variable DJANGO_SETTINGS_MODULE or with manage.py command line parameter --settings=.. Read more in docs: docs.djangoproject.com/en/2.0/topics/settings
– mirek
Feb 8 '18 at 20:51
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ALTER TABLE, set null in not null column, PostgreSQL 9.1
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Execute the command in this format
ALTER TABLE tablename ALTER COLUMN columnname SET NOT NULL;
for setting the column to not null.
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Ruby on Rails form_for select field with class
..._class' }) %>
select helper takes two options hashes, one for select, and the second for html options. So all you need is to give default empty options as first param after list of items and then add your class to html_options.
http://api.rubyonrails.org/classes/ActionView/Helpers/FormOptionsH...
How to make a class conform to a protocol in Swift?
... error... You might not need to implement the entire protocol in all cases and might want to build prior to doing so... it's not a big deal, but feels a bit unnecessary.
– Magoo
Mar 31 '16 at 11:52
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How to make Scroll From Source feature always enabled?
... @EatatJoes -- in VS go to Tools -> Options -> Projects and Solutions -> General and enable the checkbox "Track Active Item in Solution Explorer".
– Tomas Karban
May 16 '14 at 0:35
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Filter output in logcat by tagname
... if some app is spamming Debug then set the logcat level to only show Info and higher levels: logcat *:I
– Someone Somewhere
Jan 13 '12 at 22:15
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Unable to find a locale path to store translations for file __init__.py
...h {% trans %} in my templates. However, when I execute the following command in my app folder, I receive an error message:
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Java: int array initializes with nonzero elements
... with a situation where it is not. Such a behavior occurs first in JDK 7u4 and also occurs in all later updates (I use 64-bit implementation). The following code throws exception:
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MySQL: What's the difference between float and double?
...ndering why, I checked the mysql documentation, but honestly didn't understand what the difference is.
6 Answers
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java: (String[])List.toArray() gives ClassCastException
The following code (run in android) always gives me a ClassCastException in the 3rd line:
4 Answers
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